In this technical note, the delivery systems normally considered for rural villages are described in terms of three levels of service. These depend on the constructing, operating and maintenance costs and techniques, and their impact on the consumer's health and convenience.
USAID (1982): Methods of Delivering Water. Washington D.C. (USA): United States Agency for International Development (USAID). Water for the World -Technical Note No. RWS. 4.M URL [Accessed: 15.05.2019]